| Chong WAH Supermarket Limited | Wholesale & retail | 2000 |
| Chrash Management Services Limited | Real estate | 2015 |
| Chris O'Neill Consulting Limited | Professional & scientific | 2023 |
| Christine's Sewing Service Limited | Professional & scientific | 2015 |
| Church Gate Homes Ltd | Construction | 2012 |
| Civil Power Limited | Professional & scientific | 2014 |
| Cj's Bar and Kitchen Limited | Hospitality | 2025 |
| Claire Cairns Associates Limited | Professional & scientific | 2007 |
| Clarity VM Limited | Manufacturing | 2012 |
| Classicalfitnesspro Ltd | Arts & recreation | 2020 |
| Claughton Furniture Limited | Manufacturing | 2017 |
| CMC Decorators (Hull) Limited | Construction | 2008 |
| CMC Fire Stopping Ltd | Construction | 2024 |
| CN Childcare Ltd | Education | 2025 |
| Cobain Roofing Ltd | Construction | 2010 |
| Colin Lewis Self Build Limited | Construction | 2006 |
| CONATU1701 Limited | Professional & scientific | 2011 |
| Cooper Electrical Limited | Construction | 2015 |
| Cormus Limited | Wholesale & retail | 2026 |
| Coronary Care Ltd | Health & social care | 2022 |
| Cotj Property Limited | Real estate | 2025 |
| Cowx Aquatic Resources Management Limited | Professional & scientific | 2016 |
| Creative Wealth Management Ltd | Financial services | 2007 |
| Cronin Contracts Limited | Administrative & support | 2019 |
| CTF Property Limited | Real estate | 2022 |
| CTF Training Services Limited | Professional & scientific | 2021 |
| Customlens AI Limited | Professional & scientific | 2023 |
| CW Glass Repairs Ltd | Wholesale & retail | 2026 |
| Cygneture Barbers Limited | Other services | 2024 |
| D Cole & Sons Ltd | Transport & logistics | 2021 |
| D Harper Holdings Limited | Real estate | 2024 |
| D. T. Pipelines Limited | Construction | 2008 |
| D.A.O (Hull) Limited | Construction | 2025 |
| DAN Dixon Enterprise Ltd | Hospitality | 2023 |
| Databiite Ltd | Information & communication | 2023 |
| Datamovements Limited | Information & communication | 2016 |
| David Walker Holdings Limited | Professional & scientific | 1988 |
| DCL Project Solutions Limited | Information & communication | 2013 |
| DEE House (Kingston) Limited | Hospitality | 2009 |
| Definitive Media Worldwide Ltd | Information & communication | 2014 |
| Defy Limitation Fitness Ltd | Arts & recreation | 2021 |
| Delta Consultants Ltd | Professional & scientific | 2024 |
| Design Over Technology Ltd | Administrative & support | 2019 |
| DEV and SUP Co Limited | Real estate | 2023 |
| DEVELOP4SUCCESS Ltd | Professional & scientific | 2023 |
| Devoy Investments Limited | Real estate | 2026 |
| DGF Trading Co. Limited | Professional & scientific | 2014 |
| Digital Accounting Limited | Professional & scientific | 2003 |
| Direct WAX Injection Limited | Wholesale & retail | 2003 |
| DLN Life Services Limited | Health & social care | 2017 |
| DO Everything Differently Limited | Professional & scientific | 2013 |
| Dommad Investments Limited | Real estate | 2018 |
| DR Kumar Ltd | Health & social care | 2011 |
| Dreams Accomodation Ltd | Real estate | 2023 |
| Dunston House Properties Limited | Construction | 2005 |
| Dynamic Drill and Fire Limited | Construction | 2015 |
| E4 Concepts Ltd | Professional & scientific | 2015 |
| EAC Property Ltd | Real estate | 2018 |
| Eagle House Personal Development CIC | Education | 2013 |
| Eagle Roofing (UK) Limited | Construction | 2006 |
| East Riding Christmas Trees Limited | Wholesale & retail | 2023 |
| East Riding Floors Ltd | Construction | 2017 |
| East Yorkshire Lets Ltd | Real estate | 2025 |
| Easy Digital Media Ltd | Administrative & support | 2019 |
| Ecotiva Limited | Manufacturing | 2018 |
| Edendale Homes Ltd | Health & social care | 2025 |
| EDM Distribution Limited | Information & communication | 2018 |
| Education Alliance Social Value Limited | Education | 2019 |
| Elevation Design Limited | Professional & scientific | 2003 |
| Elite Caravan Transport Limited | Transport & logistics | 2022 |
| Elite Care & Training Services Ltd | Administrative & support | 2024 |
| Emarketing England Limited | Professional & scientific | 2015 |
| Engine 7 Limited | Information & communication | 2014 |
| Engineroom Network Ltd | Information & communication | 2026 |
| EPL Kiosks Limited | Information & communication | 2020 |
| Esther Callis Limited | Administrative & support | 2009 |
| Everthorpe Plants Limited | Wholesale & retail | 2024 |
| Everyday Wellbeing CIC | Public administration | 2026 |
| Evisa Financial Ltd | Professional & scientific | 2024 |
| Evolve Insights Ltd | Information & communication | 2017 |
| Evora Construction Limited | Construction | 2009 |
| Executive Light Aircraft Leasing LLP | | 2019 |
| Export Management Partners Ltd. | Professional & scientific | 2018 |
| Eyepro Security Ltd | Construction | 2013 |
| F Youssef Ltd | Health & social care | 2015 |
| F&D Agency Limited | Wholesale & retail | 2021 |
| Falcons Properties Ltd. | Real estate | 2023 |
| Farquhar Land Holdings Limited | Professional & scientific | 2024 |
| Fashion & Design Handbags Ltd | Wholesale & retail | 2024 |
| Fatpot Clothing Limited | Wholesale & retail | 2024 |
| Fenceline (UK) Ltd | Construction | 2012 |
| Fenceline Barriers and Trackway Ltd | Construction | 2020 |
| Ferriby Consulting Limited | Professional & scientific | 2025 |
| Ferriby CUT Ltd | Other services | 2025 |
| Ferriby Fencing & Gardening Contractors Limited | Agriculture & fishing | 2004 |
| Ferriby Hall Limited | Financial services | 2024 |
| Ferriby Hall Nominees Limited | Real estate | 2008 |
| Ferriby Hall Properties Limited | Real estate | 1991 |
| Ferriby Pizza 27 Ltd | Hospitality | 2025 |
| Ferriby Sales and Marketing Limited | Other services | 2014 |